Fur Post Construction - By J. Gottfred

When the fur trading companies created a new post, they needed
to build some sort of lodging to provide comfort for the winter and to protect
the goods and furs that they were trading. At first glance, the problem seems
easy enough to solve, but the resulting buildings had to meet several
important criteria:

They had to be large enough to hold the goods and to
provide shelter for several people.

They had to be weather-proof, especially against the cold
of the Canadian winter.

They had to be quick and easy to construct with mostly
unskilled labour.

The design had to be able to cope with the dramatic
shrinkage that would occur when using green wood as the construction material,
and to handle the changes in the dimension of the wood from the hot, humid
summers to the cold dry winters.

When English settlers first arrived in North America, the
typical style of building in England was the "half- timbered" house in which the
frame of the house was constructed with timbers and the spaces between filled
with bricks or masonry. This style of construction was quite complex, and the
English, influenced by Swedish, German, and Dutch techniques, rapidly switched
to what is called "Swedish" style construction in which notched round logs are
interlaced one on top of the other in classic "log cabin" style.

"Swedish" construction - An example from Ft. Walsh, late
1800's

In finer construction of this type the timbers would be squared, the ends would not stick out at the
corners, and the overlapping joins would be dovetailed. The French in Lower Canada called log construction in general "pièces
de bois sur pièces de bois" or "wood
pieces on wood pieces" construction. This was later shortened to "pièce sur pièce",
or "piece on piece" construction. They called the finer style of
construction using dovetailed corners "à queue
d'aronde".

"Pièce sur pièce
à queue d'aronde" construction - Note how the overlapped wood is cut at an angle. This makes the
wall more secure, and, more importantly, helps water drain out of the join thus
reducing rot. This style was generally not used by the fur traders probably due
to the complexity of the joins and the problems with shrinkage.

The fur traders did build some fur post buildings in the
"Swedish" style, but it seems that it was only used if manpower was short, the
post was temporary, and only a small building was required. The major problem with
this style of construction was that the green wood shrank as it dried. Wood only
shrinks a tiny amount along the grain, with most shrinkage occurring across the
grain. In other words, as a log or timber dries it does not get any shorter, it
just gets thinner. As the walls and corners shrank at different rates, gaps
would open at the roof line and between the logs. The traders who spent the
winter in such constructions complained about the cold, drafty conditions. (See
"Other styles").

"Pièce sur pièce
poteaux et pièce
coulissante" Construction - Most fur post buildings were built with "post and
sliding piece" construction. In this example, the posts are resting upon sills
("poteaux sur sole"). Sometimes the posts were simply placed in post holes in
the ground "poteaux en terre" (a bad idea if you want the place to last!)

Fortunately, in Canada there was another building tradition,
which had developed along quite different lines. When the French colonized New
France, they made sure to send along skilled joiners who were well versed in the
techniques employed in the old country. In northern France they framed buildings
with grooved uprights filled with planks, a technique known today in Europe as "plankwall
framing". Given the severity of the Quebec weather combined with the abundance
of timber, it was a simple matter to replace the planks with whole, squared and
tenonned timbers for the fill. This technique solved the problem of wood
shrinkage because the vertical uprights would keep the roof from moving while
the horizontal timbered fill shrank. This method of pièce sur pièce
construction was called poteaux et pièce
coulissante or "posts and sliding piece". This style of
construction is well adapted to making buildings of almost any size. Another
nice advantage of this technique is that it lends itself well to making two
story buildings, something which the fur traders required at the larger posts.

"Poteaux et pièce
coulissante" Construction - The Indian trading house at Old Fort William

Montreal was the base for all the fur companies (except the
Hudson’s Bay Company), so the men and carpenters that were hired
by those companies were well versed in the French building tradition of grooved
posts and sliding piece construction. It was these men, in the employ of the fur
companies, that first took this method all across Canada and even down into the
United States. This method became the standard technique for building fur posts,
and became so widespread that in Canada today it is known by different names
depending upon the region in which it is found. Across the county it is
variously called "Red River", "Manitoba", "Rocky Mountain", "Hudson’s Bay" or
simply "Canadian" frame construction. It is all "poteaux et pièce
coulissante".

In Quebec, buildings constructed in this fashion were set on stone
foundation walls and their roofs were supported by complex truss systems. Also
the horizontal fill timbers were pegged through the post and tenon to keep them from moving
as the wood shrank. The fur traders generally did not bother with any
foundation, they greatly simplified the roof to use a simple ridgepole design,
and they didn’t bother to peg the horizontal fill except where required for
structural integrity. When gaps opened up in the fill it was a simple matter to
drive in a few wedges to re-space the timbers, and then re-chink.

The timbers themselves are much easier to make than you might imagine. The
process of converting a round log into a squared timber is called "hewing". Once
a tree has been felled and the ends squared off with a saw, the carpenter can
then draw the shape of the timber that he wants on the ends, and a chalk line
can be snapped along the log to show what material needs to be removed. The
first step is to stand on the log and, using a common axe, score the waste wood
down close to the chalk line every foot or so along the length of the log. The
scoring allows the waste material to fall away easily once the hewing begins.

Scoring - The carpenter at Old Fort William demonstrates how
to score a log prior to hewing.

The hewing is done with a special tool called a hewing axe. A
hewing axe differs from a regular axe in two important ways. First, the blade is
beveled on only one side. The other side is perfectly flat. On a right-handed
hewing axe, the left side of the blade is the flat one. The edge is put on by
beveling the right edge only. The second difference is that the handle of the
hewing axe is offset in order to keep the users hands clear of the log. On a
right-handed hewing axe, the handle angles out to the right.

To use the hewing axe, the hewer stands next to the log and
cuts into the waste material with the blade parallel to the chalk line. The
technique is to slap the flat blade against the work already done, and let the
blade slide downwards. The flat blade does not dive into the wood, instead
it shaves away the waste material. The resulting finish is as smooth as if the
log had been planed. In fact, that is what you are doing, planing the log with
the hewing axe. It’s a bit tricky to get the feel of the offset handle, but
after a while you just get going along at an amazing rate of speed. When I took
my hewing lesson at Old Fort William, we finished off one side of a twelve foot long
hardwood log in fifteen minutes. The entire timber, perfectly squared, was hewed
out in less than an hour using the right tools.

Hewing - The specialized hewing axe shaves away the waste
material. Note the shape of the final timber drawn on the end of the log. By
using a chalked line to match up the corner points with the drawing at the other
end of the log, the hewer has a guideline as to what material should be
removed.

Proper chinking, used at posts supplied by ships, consisted of oakum and clay pounded into the
cracks. Oakum is a curious substance that is made from old rope. In the days of
the fur trade, rope was made from hemp, an extremely durable and strong fibre.
The problem with hemp is that it rots if left wet. To help prevent this, rope
was impregnated with tar to help preserve it from the elements. Once a rope had
run its useful life, it would be picked apart into a fuzzy, tarry mass called oakum, which
makes ideal chinking material. In the Northwest, oakum was not available and so
buildings were chinked with clay and grass instead. It is important that the
chinking material have some springiness. If the chinking is rock hard, then when
the wood swells during the humid summers the wood fibres are compressed against
the immovable chinking, and when the moisture leaves the wood again in the dry
winter, a small gap begins to open. Repeated cycles ultimately result in the
chinking becoming loose and falling out.

Roofs were a special problem. At the large, permanent posts
the buildings would be properly shingled over an English style rafter system
built by experienced carpenters and joiners. However, the
smaller, temporary posts usually did not have the skills (or time) at hand for
such a complex job. As a result, the roofs most commonly described consist of a
simple ridgepole with boards or split logs running down to the top of the wall, with
the gables filled in with planks or timbers. The roofs were then covered with
almost anything you can imagine to try to keep them from leaking. Bark, sod,
thatch, mown grass & earth, clay, even tent leather was used. The journals
give a strong impression that anything other than proper shingles would
inevitably leak.

The attic space was sometimes used for storage, or as a loft
(warm air rises, so the upper floor would be the warmest). At the larger posts,
some buildings were constructed with two stories.

Even the rudest buildings would have a floor because a raised
floor is the only way to ensure things stay dry. Again, the quality of
construction varied from simple split logs (round side down) to
tongue-in-grooved boards. Planking was common.

Planks were made using a saw pit. A hole is dug in the ground
and the log placed above. One man stands in the hole and another stands on top
of the log. The plank is sawn out along the length of the log with the cut
occurring on the down stroke. One can imagine what a miserable job this would
have been for the poor fellow on the bottom!

As a rule, windows were covered with
parchment (rawhide), with or without shutters. Or they were simply left as openings with shutters. (In mosquito
country, I’d opt for the parchment, but the journals never mention a reason for
choosing one method over another). The posts supplied by ship (e.g. the North West
Company headquarters on Lake Superior) had luxuries such as many glass windows.
Inland, glass was rarer, but out of six archaeological reports that we have for
posts occupied prior to 1830, three of them positively identified window glass
fragments, while at the three other sites other possible window glass fragments
were not definitively classified as such, apparently because the authors
couldn't quite believe it. We know from journals that Cumberland House had two glass windows in
1777. It stands to reason that the proprietor of a post may very well have had
one or two small panes of glass in one of his windows so that he could keep an
eye on things. (If they could successfully transport china plates to the
northwest, a couple of small squares of glass does not seem impossible.)

Doors were always made for the buildings, even for interior
partitions. By all accounts they were made of planks and constructed with nails.
Iron hinges were used to hang the doors, and the goods storage in particular
could be locked with an iron hasp and lock, or a proper door lock. Other buildings might only have a
wooden latch.

Fireplaces were made of various
materials depending upon labour and availability of stone. The big posts had
fireboxes and chimneys made of stone. Small posts, especially those without
enough men to gather
stone, built both the firebox and chimney out of mud brick. The brick was made
by mixing grass with the local clay and letting it dry in the sun. The most
common construction appears to have been a firebox made with stone, and the
chimney made of mud and grass. This option certainly sounds the safest if you
are lacking concrete and kiln dried brickwork. I don’t think that I would want a
heavy stone and clay chimney towering over my head. Even the mud versions were
dangerous enough – Alexander Henry the Younger had a narrow escape from a mud chimney that collapsed
near him in the middle of the night. The fireboxes and
chimneys were often placed between two rooms so that each room might share in
the chimney.

Once the building was completed, the outside was usually
finished with a whitewash. Most posts simply used white clay, but a few actually
built lime kilns and produced true whitewash!

The interior space of buildings would be divided with
partitions depending upon their intended use. A private room for the proprietor,
trading rooms and clerks rooms were all the norm. Additional houses might be
made for the men. Some houses had cook rooms.

The number of buildings would vary depending upon the size of
the post and its importance. The inland headquarters of the North West Company
had around forty! Most of the posts that would be occupied for several years would
have a locked ware house and/or trading room, a main house for the proprietor
and the clerks, and one or more houses for the men. Additional buildings would
be added as required. Examples specifically mentioned in journals include powder
magazines, canoe sheds, and stables. Archaeological evidence for a blacksmith
workshop exists at Fort George (N. Saskatchewan River) and Fort Augustus.

Every post of any size would also have an
ice house. These were the refrigerators of the day,
and if built properly, worked extremely well. George Simpson, the Governor of
the Hudson’s Bay Company, sent these instructions to all the posts detailing the
proper way to build an ice house: "Ice houses should be formed by digging large and deep
excavations in the ground, the sides of which must be supported by log walls and
the top, above ground, well covered over with a double roof set 2 or 3 feet
apart, both composed of thick thatch." (Simpson, 316)

Most of the posts were also surrounded by a
stockade. These
constructions varied in robustness from flimsy gap-toothed things that blew down
in strong winds to 12’ high solid oak edifices complete with bastions with
loop-holes. J. Mackenzie described the palisade walls of Ft. Chipewyan in 1799: "We are every moment in imminent danger of being squeezed to
death by the fort pickets, which seem to have long ago been at war with one
another. Several ‘pagées’ of them are at present flat on the ground and several
more are in doubt whether they should fall or not." (Masson 2:387)

The typical method of construction for stockades was to dig a
trench, plant the poles (usually left round, but sometimes squared), and then
fill the trench up again. The poles would be held together by fixing them to
cross pieces with trenails-- wooden pegs driven into auger holes.

If there was no stockade around the buildings, there
definitely was one around the garden. Most posts had gardens where potatoes etc.
could be grown, and these needed to be protected from animals. Usually, however,
the garden was enclosed within the stockade along with the buildings.

The final touch was to raise a flagpole. At some posts these were enormous, 75' tall in one case! There seems
little doubt that there was a certain "mine is bigger than yours"
symbolism about the whole thing. I suppose one might make the
argument that a tall flagpole would be an aid to navigation, however, as they
only flew the flag on Sunday, and probably produced columns of smoke hundreds of
feet high on a daily basis, this argument seems groundless.

Today there are many excellent examples of
historic sites where the buildings have been reconstructed with as much accuracy
as possible. These sites are an excellent and valuable resource for learning
about how the fur traders lived and worked. However, you must remember when
visiting these sites that
unlike the original fur posts, they have been built to last for generations,
designed with the safety of visitors in mind, and are subject to budgetary and
political constraints wholly different from the originals. The chimneys
must be of stone and concrete, not mud. The stockade walls must be robust and
securely fixed so that no-one is crushed by a toppling wall. Parchment for the
windows is too expensive and fragile. Buildings must rest on proper foundations.
Seasoned wood is used for building, so the effects of shrinkage do not happen.
Roofs must be properly weather and fire-proof and easy to maintain (hence the
widespread use of shingles). Chinking must be secure and not fall out, hence the
use of caulking, the grounds must be clean and free of wood scraps and other
garbage, and perhaps most often overlooked, the ground itself must be
covered with pea gravel, (or something equally unhistoric), as mud will simply
drive away the tourists and ruin the floors. Consequently, as a visitor you are
seeing a somewhat idealized version of what the original would have looked like,
and a friendly, well-fed summer staff of students with perfect teeth fitted out
in one-size-fits-none costumes are a poor facsimile of trail-worn hivernants
trying to avoid another work detail. Still, keeping these differences in mind, a
visit to one of these sites is an excellent way to gain an appreciation for what
the fur traders were able to accomplish a thousand miles from
civilization, and the amazing level of comfort that they were able to provide
for themselves with some simple tools and a few strong backs.

Insides of living quarters were plastered as well as the
outsides [presumably with clay] and this was different than whitewashing
which was also done. L. Keith, 114,137-138,
166, 170, 175, 297-298, 312-313, 336. Rich, Cumberland, 2:72-78.

Fine white clay used as whitewash and serving as well as
lime. Gough, 1:123.

Inside walls of shop not plastered to keep it from
spoiling the furs and grease when falls off. Nelson, 153.

Gates, Charles M. Five Fur Traders of the Northwest :
Being the Narrative of Peter Pond and the Diaries of John Macdonell, Archibald
N. McLeod, High Faries, and Thomas Connor. Minnesota Historical Society :
St. Paul, Minnesota, 1965.

Keith, Lloyd. North of Athabasca: Slave Lake and Mackenzie
River Documents of the North West Company, 1800-1821. McGill-Queen's
University Press: Montreal, 2001. ISBN 0-7735-2098-8.

Kidd, Robert S. Archeological Excavations at the Probable
Site of the First Fort Edmonton or Fort Augustus, 1795 to Early 1800's". Provincial Museum
of Alberta Human History Occasional Paper No. 3. Alberta Culture and
Multiculturalism Historical Resources Division, 1987.

Kidd, Robert S. Fort George and the Early Fur Trade in
Alberta. Provincial Museum and Archives of Alberta Publication No. 2.
Queen's Printer for Alberta : Edmonton, 1970.